well this is a first, now I get 1017 before I can even select a character (which doesn't make much sense, because I haven't tried to log into a world yet).

And all because i crashed on tabbing out to check some news.... While most of the time you can alt tab from fullscreen without issues, it still crashes occasionally. Which right now means you might be able to play all day just because you got really unlucky. =\

So don't risk it. Don't alt tab, or don't use full screen.